Yes.
2. 2 plus 2 equals 4 and 2(2)= 4
They are expressions.
In C++ all false relational expressions have a mathematical value of 0.
five plus five equals ten...
4y -5
These are two expressions, not equations. Expressions do not have solutions, only equations do. NB equations include the equals sign.
If a + b = 6, what is the value of 3a + 3b?
2 plus n is the true one, but 1 plus n is not?
You meana += ++a - --a?Well, it can be anything, depending on the compiler's decision. Never ever write expressions like this.
It is the same as 54 plus 36 and both expressions add to 90
13.056
The answer depends on the value of y.